Integer overflow in Libssh2
CVE-2026-7598
A security vulnerability has been detected in libssh2 up to 1.11.1. The impacted element is the function userauth_password of the file src/userauth.c. Such manipulation of the argument username_len/password_len leads to integer overflow. T…
EPSS: 0.001 (22.7th percentile) — read the EPSS interpretation.
CVSS v3 metric
CVSS v3 base score 7.3 (High). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:L.
Affected products
- Libssh2
- N/a Libssh2 — versions 1.11.0, 1.11.1
Weakness classification (CWE)
References
- cna@vuldb.com (Product, product)
- cna@vuldb.com (Patch, patch)
- cna@vuldb.com (issue-tracking, patch, Issue Tracking)
- Submit #805564 | libssh2 <= 1.11.1 Integer Overflow (Third Party Advisory, VDB Entry, third-party-advisory)
- VDB-360555 | libssh2 userauth.c userauth_password integer overflow (technical-description, Third Party Advisory, VDB Entry, vdb-entry)
- VDB-360555 | CTI Indicators (IOB, IOC, IOA) (signature, Permissions Required, permissions-required, VDB Entry)
Frequently asked questions
- What is CVE-2026-7598?
- CVE-2026-7598 is a high-severity vulnerability in Libssh2, classified under CWE-189. CVSS score: 7.3/10. Published 2026-05-01.
- How severe is CVE-2026-7598?
- High severity. CVSS v3 base score is 7.3 out of 10.